so? if you bought a Mac just for gaming.. your weird.
Its about buying a Mac and ALSO being able to game on it... not that its the only reason your using it. I wouldn't use that Dell if it was given to me for free... I'd just sell it.... its useless. I'm sure it works fine for someone who just wants to game.
I dunno, barring the CPU and GPU options they're rather good for gaming. They're quiet, very fast booting (at least into OSX), amazing displays, compact for LAN parties but with more juice than a laptop.